Speed Square Challenge is a fast-paced game that tests your speed and reflexes. In this game, you must quickly move a square around a board filled with obstacles and collect points as you go. You must avoid the obstacles and reach the end of the board before the timer runs out
From Wikipedia
A speed square, also called a rafter square, rafter angle square, and triangle square, is a multi-purpose triangular carpenters' tool used for marking out. Its functions encompass many of those offered by combination squares, try squares, and framing squares. Carpenters use it to make basic measurements and mark lines on dimensional lumber, and as a saw guide for short 45 and 90 degree cuts.